Inverted incandescent gas-burner.



No. 816,427. PATENTED MAR. 2'7, 1906. J. BRIDGER. INVERTED INOANDESGENT GAS BURNER.

APPLICATION FILED MAYB, 1905.

ITED TAZ E PA'rnNr cr tic-E JAMES BRIDGEB, or LONDON, ENGLAND, ASSIGNOR TO THE NEW INVERTED INCANDESOENT eAs LAMP COMPANY, LIMITED, o

LONDON, ENGLAND.

INVERTED INCANDESQENT GAS-BURNER- new and usefullmprovements in or Relating to Inverted Incandescent Gas-Burners, of which the followingis a specification.

In inverted incandescent gas-burners as heretofore constructed the air and gas neces sary to form the combustible mixture, @1- though admittedin suitable proportions to the Bunsen tube, frequently rush through theburner at such a rate that no proper mixing of them ensues, and the consequences of this imperfect mixing are that what are known as "carbonizi ng troubles result,

thereby impairing the luminosityof, the inantle and blackening the burner, that frequently a very disagreeable hissing or buzzing noise is produced, and thatflashing or lighting back ofthe flame sometimes takes place, which is apt to be attended with serious and annoying results.

Now the object of this invention is toremedy these disadvantages or inconveniences and to provide a burner in which an intimate or perfect mixture of the air and gas shall be insured, which shall be noiseless when in use, and in which liability of the flame to flash or light back shall be obviated, so rendering the burner eflicient and safe at all times, while greatly enhancing its lighting or illuminating properties. To this end there is interposed at a convenient point in thelength of the Bunsen tube a mixing-chamber the interior of which is provided with a deflecting device and with a foraminous cage or basket, which are so disposed relatively to each other that the air and gas initially mixed in said tube on entering said chamber are deflected outwardly by the deflecting device and are caused to pass through the cage or basket, so that they become broken or split up by this latter into numerous fine ets or streams, which then reunite or combine and pass from the mixing-chamber to the burner tube or nozzle in an intimately-mixed condition suitable for proper combustion.

A device of the character above set forth will be found particularly applicable to that type of inverted incandescent gas -burner Specification of Letters Patent. Applicatieu filed May 8,1965. Serial No. 259,47

em loying an external deflector or cone and wil therefore be described in connection Referring to the accompanying drawings, Figure 1 is a vertical sectionalwiew"ofone form of aninverted incandescent gasfbuiner constructed in accordance with the invention, but with the mantle and its removed. Fig. 2 is a hori'zontal section thereof, taken on theline in ref Fig. I an dfF 3is a detached view, partly in' vertical "section, showing the deflecting device anfdits'cag'elor fbasket. t I In carrying out the invention the Bunsen tube. is divided into two portidiisad, theiip per one, a, ofiwhich (provided, as usual',"with air-holes e and injector a conducts th'eiiiit tially-niixed air and ga's to the"'r'nixing 'ci'lia'rii1- her I) b, to the upper part of which it'is'secured by a screw-threaded corinectionfhs shown. The lower portionddf saidltube is in similar manner securedat itsupberf'end to the lowerpart b of the mixing cli'ariiber and at its lower end'carri'es' the I The upperand lower parts I) and'iiflrespectively, of themixin'g 'chamber aredetachable screwing one into the other, assh'own at'lifl' or in any other appropriate way', andsaid' chamber is of any convenient shape or c'oniigiir'ation' The internal deflector c is advanta eously a cone or conoid and is either solid or ollow. It is arranged apex upward within the cage or basket (1, which here consists of wire-gauze of a suitable mesh. The said cage has at its upper or open end a rim or flange d, which is seated upon the upper edge of the part b of the chamber and is conveniently retained in position by an annular shoulder b on the upper part Z). From this rim or flange the cage is suspended, and it carries within it the deflector c, which may be secured to its bottom by a rivet or screw 0 or by being screwed therein, and said deflector extends upwardto a point approximately level with or just above the aforesaid rim or flange d of the cage d. Between this deflector c and the sides of the cage or basket (1 there is an annular space 61 (clearly seen in Fig. 2,) and be tween said cage and the wall of the chamber Patented March 27, 1906. f

from each other, beingcorinected'to 'etherfby b b there is another annular space I), the arrangement being such that the initially or imperfectly mixed air and gas on issuing from the portion a of the Bunsen tube are deflected by the deflector c and are thus caused to pass into the space (V and thence through the meshes of the cage d into the space b*, after which the air and gas broken up by their passage through the said cage flow downwardly, reunite or combine in the space 12 near the outlet end of the mixing-chamber, and thence pass into the lower part or nozzle a of the Bunsen tube in an intimately-mixed condition suitable for proper and silent combustion.

The upper portion of the Bunsen tube is preferably tapered downward, as shown in the drawings; but, if desired, the said tube may be straight throughout.

By this arrangement it will be seen that the combustible mixture of air and gas undergoes two different mixings-viz., the initial or preliminary one in the upper part of the Bunsenburner tube and. the secondary or final one in the mixingchamberand that said mixture is therefore brought into such a thoroughly intimate condition as to be eminently suitable for incandescent gas-lighting.

In the burner illustrated, in which an external cone or deflector e (of porcelain or metal) is employed, the above-described mixing-chamber is located within said deflector, and an anular space 6 is advantaeously provided between them to permit of a 'ree circulation of air around the mixingchamber to keep it cool.

Although in the arrangement shown in the drawings the lower portion a of the Bunsen tube fits into the lower portion 6 of the mixing-chamber, it will be obvious that, if desired, the lower end of the external deflector or cone 6 may be extended to form the burner tube or nozzle and that in such case g the lower end of the mixing-chamber would be open and lead directly into the extended end of the deflector or cone e.

Having now described my invention, what I claim, and desire to secure by Letters Pat ent, is

1. In an inverted incandescent gas-burner, the combination of a Bunsen tube divided into two portions, a mixing-chamber having means for attaching its upper end to the upper portion of the Bunsen tube, and its lower end to the lower portion of said tube, a foraminous cage or basket in said chamber, and a conical or conoidal deflector in said cage or basket.

2. In an inverted incandescent gasburner, the combination with the Bunsen tube of a mixing-chamber constructed in two detachable parts and interposed in the length of said tube, a'foraminous cage or basket located in said chamber and having its lower end closed, a rim or flange on the upper end of said cage or basket adapted to be supported Within the mixing-chamber, and a conical or conoidal deflector extending upward from the bottom of the cage or basket.

3. In an inverted incandescent gas-burner, the combination, with the Bunsen tube, of a mixing chamber interposed in the len th of said tube, a foraminous cage or basket .within said chamber, an internal deflector In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JAMES BRIDGER. Witnesses:

COLIN H. BURTON, H. D. JAMEsoN. 

